Rock crusher



Q Marcl110,1942. P PE mt 2,275,649

ROCK CRUS HER Filed Feb. 24, 1941 v 2 Sheets-She et l attorney March 10, 1942. H. c. POPE ET AL.

ROCK CRUSHER Filed Feb. 24, 1941 2 Sheets-Shet 2 3nnentor Pope,

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attorney Patented Mar. 10, 1942 ROCK oRUsHEn HenryClay Popeand Robert William Lawson, Erwin, Tenn..

Application February 24, 1941,*S'erial No. 330,344-

5 Claims;

This invention relates to rock crushers, and more particularly to the novel construction of a rockcrusher wherein a pair of movable jaws, ar: ranged in generally V-formation, are recipro cated between opposed; fixed jaws, and are so mounted for reciprocation that they. float between the fixed jaws and are maintained in bal: ance with respect thereto; all as will be described more fully hereinafter, and as claimed.

It is an object of the invention to provide a rock crusher whichis sustained by spring'rneans in a manner to render themovable jaws .yieldable in balance with respect to the fixed jaws.

Another object of the inventionis to provide a rock crusher having a cam-reciprocated'movable jaw whose movement toward the fixed jaw is effected. against spring pressure which-is exerted in part in suspending the movable jaw and renderingit floating with respect'to the fixed jaw.

A further object is to provide a. rock crusher in 1 which either the fixed or the movable jaw, or both, may have a replaceable Wearing surface applied to it, which surface may be plain or corrugated as dictated by operating requirements;

Other and further objects and advantages of the invention will be apparent from the following description with reference to the'accomp'anying drawings, in which Figure 1 is a vertical sectional view taken along the line |l of Figure 2.

Figure 2 is a vertical sectional view, taken at right angles to the view in Figure l, along the line 2--2 of Figure 1.

Figure 3 is a vertical sectionalview, similar to that of Fig. 1, of a modified form of our inven tion, taken along the line 33 of Figure i.

Figure 4 is a vertical sectional view of the modification, taken at right angles to the view shown in Figure 3 and along the line 4-4 of Figure 3.

Referring more particularly'to the drawings and first to the form of invention shown in Figures 1 and 2, the side walls In of the rock crusher incline downwardly to a discharge opening at the bottom and are supported by ribs or bracing means II. The angle of slope of the side walls increases adjacent the top of the crusher to facilitate the feed to materials thereto. The side walls l constitute the fixed jaws and, if desired, they may have a sheathing l2 removably attached to them to serve as a wearing surface which may be replaced when worn.

A generally V-shaped unit constituting the movable jaws is mounted for reciprocation beconverging jaw elements 'I 3 extendin'planes parallel or substantially parallel tothe lower; crushingsurfaces" of the respective fixed jaws l0 and these, like thefixed-jaws, may have'replaceable wearing surfaces Maffixed to them, which wear ing surfaces may, likewise; be plain or corruated.

The'end walls l5 of the movable jaw unit are confined'within the ends Iii-of thecrusher frame and, as shown in Figure 2, they mount a-cross beam H which projects through vertically elongated openings l8 in the crusher frame and whose ends aresupported upon a pair of compression springs |9.- The compression springs l9 are seated upon the outwardly extending flanges 23. of channel beams 2| which extend along the base of :the crusher frame.

Bearings-22 and'23project inwardly from'the ends l5 of themovable jaw member and-may be formed with webs Which' connect them integrally with the respective movable jaws. The bearings have suitable liners 24 to receive the pintles 25 of a roller 26 which is thereby'journalled in the median plane of the crushing jaw unit.

At the upper edges of the end walls 16 a pairoi L-beams are secured with their flanges projecting outwardlyto serve as supports for the'spaced journal bearings 21 in which the drive shaft 28 is received. A cam 29 on the drive shaft bears against the'roller 26 which is held in contact with it by the springs l9 acting through the movable jaw unit.

A suspension framework30; held by bridging straps3l, includes a pair of cross struts 32 whose faces-are set at "anangle and to which the ends of apair of tension springs 33 are anchored. At their opposite endsthe-tension springs are attached'to hooks 3 lwhichengage in eye brackets 35 'on'the opposite-movable .J'aw elements. Thus, byreason of 1 the symmetrical. mounting of *the springs 33 and theiranchorageabove the point of their attachment to the movable jaw elements, the tension components eifect a centering of the movable jaw unit in the space between the fixed jaws and, with the compression springs acting in the median plane of the crusher, the movable jaw unit is maintained balanced and floating. The movable jaws are also guided in their vertical reciprocation by the cross beam I! working within the confines of the slots I 8 in the crusher walls.

In the modification shown in Figures 3 and 4, the same arrangement of parts is employed, except that an eccentric sleeve 36 surrounds the tween the converging fixed jaws. Downwardly cam 29, such sleeve bearing upon a pair of spaced push rods 31 and 38 which rise from the cross beam l1, thereby in rotation of the drive shaft to reciprocate the movable jaws.

In operation, rock of appropriate size is deposited in the upper, enlarged part of the crusher from whence it passes downwardly along the inclined walls and is crushed by the grinding action of the movable jaws in their reciprocation which carries them towards the fixed jaws in their downward movement. The rock, crushed to size, then is discharged from the bottom of the crusher.

From the foregoing it will be apparent that our invention provides a compact, sturdy, and" durable rock crusher in which spring action sustains the movable jaw element in floating and balanced condition, thereby relieving the operating mechanism in large measure of impact forces which contribute to excessive wear.

What we claim as our invention, and desire to secure by Letters Patent, is: r

1. A rock crusher comprising a pair of downwardly inclined fixed jaws spaced apart to define a'converging space therebetween, a pair of movable jaws disposed adjacent the respective fixed jaws, driven cam means mounted above and acting upon the movable jaws to reciprocate the same in the median plane of the space defined by said inclined, fixed jaws, and. spring means for maintaining contact of the movable jaws with said cam means in the direction of their reciprocation, and a second spring means for balancing said movable jaws with respect to the fixed jaws to which they are, respectively, presented.

2. A rock crusher comprising a pair of inclined fixed jaw elements defining a converging space therebetween, a generally V-shaped movable jaw element mounted in such space, means for guiding said movable jaw element for reciprocation in the median plane of the space between the fixed jaw elements, compression spring means acting upon said movable jaw element to urge it away from said converging fixed jaw elements,

an overhead driven cam acting upon said movable jaw element to reciprocate the same in such median plane against said compression spring means, and a second spring means connected to said movable jaw element to maintain the same in balance between said fixed jaw elethrough the'end walls thereof and guided inv slots therein for vertical reciprocation of said movable jaw element, compression springs acting upon the ends of said cross beam to urge the movable jaw element upwardly and away from the said fixed jaws, an overhead cam acting upon the movable jaw element to reciprocate the same against the compression of said springs,

and a second pair of springs each anchored at one end to spaced portions of said movable jaw element and at its other end to a point nearer the median plane of the crusher; thereby to sustain the movable jaw element in balance between the fixed jaws.

4. A rock crusher comprising a pair of downwardly inclined fixed jaws spaced apart to de- "fine a converging space therebetween, end walls therefor, a pair of connected 'movable jaws mounted between said fixed jaws for reciprocation with respect thereto, a guide member projecting outwardly beyond the side edges of said movable jaws and reciprocable with said jaws in slots in said end walls, a pair of compression springs bearing upon the ends of said guide member and normally urging the movable jaws away from the fixed jaws, an overhead cam, means for rotating the same to urge the movable jaws toward the fixed jaws against the compression of said springs, and a second pair of springs each anchored at one end to one of the movable jaws and atits other endto a point nearer the median plane of said fixed and movable jaws and above the point of attachment to the movable jaws, whereby said second pair of springs serves to balance. the movable jaws and, with said first pair of springs, renders the movable jaws fioating within the space defined by the fixed jaws.

5. A rock crusher comprising a pair of downwardly inclined fixed jaws spaced apart to define a converging space therebetween, end walls therefor, replaceable wear elements attached to said fixed jaws, a pair of connected movable jaws mounted between said fixed jaws for reciprocation with respect thereto, replaceable wear elements attached ,to said movable jaws, a guide member projecting outwardly beyond the side edges of said movable jaws and reciprocable with said jaws in slots in said end walls, a pair of compression springs bearing upon the ends of said guide member and normally urging the movable jaws away from the fixed jaws, an overhead cam, means for rotating said cam to urge the movable jaws toward the fixed jaws against the compression of said springs, and a second HENRY CLAY POPE. ROBERT WILLIAM LAWSON. 

